Circular reference ... Unable to write forwarding

[tonnot]

I have a class.h with only structs definition
I have a methods.h with a class WW with some functions written as templates.

Ok, I have to declare into class.h instances to WW.
But, I have to declare #include class.h into WW so the templates can use the structures declared in class.h.

All can be solved if I could write forwarding at class.h, but I have not class.cpp.

Here is my code :

class.h

struct Tpun {
   int one_data;
   WW myww1;
};

struct Tpun {
   int one_data;
   WW myww1;
};

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methods.h

#include "class.h"
 
class WW {
public:
    WW();
   ~WW();
 
 
    template <class TT_stream>
    void put(TT_stream &value);
 
};
 
template <class TT_stream>
void WW::put (TT_stream &value) {    }

#include "class.h"

class WW {
public:
    WW();
   ~WW();


    template <class TT_stream>
    void put(TT_stream &value);

};

template <class TT_stream>
void WW::put (TT_stream &value) {    }

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Any help ?
How can I tell to class.h that uses WW ? I cant write #include "methods.h" becasue then I have circular reference ...
Have I to write class.cpp and move my structs from .h to there ?

[Santosh Reddy]

In the code you posted, class WW does not use struct Tpun, post the class / struct which are in circular reference..

Any way, you can change struct Tpun as

class WW;
 
struct Tpun {
   int one_data;
   WW * myww1;
};

class WW;

struct Tpun {
   int one_data;
   WW * myww1;
};

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All can solved if I can write forwarding at class.h, but I have not class.cpp.

can explain this again, its not clear

[tonnot]

Sorry, class.h has more than T_pun struct, in example, Tpoint.
Both class and WW are using by a third class.
In it, I create a Tpun element and a Tpoint element.

Later I want to do Tpun.myww1.put(Tpoint);
As you can see the put method is a template. It needs to know the structures to use. These structures are stored at class.h.

So I have circular reference classh #include "methods.h" and methods.h has #include "class.h"
To can write forwarding I need to write the #include at the cpp file. So I think the solution can be to move my structs from class.h to class.cpp ?
Thanks

[Santosh Reddy]

You did not get my question, I will try again...

In the code you posted, class WW does not use struct Tpun, post the class / struct which are in circular reference..

- In class.h
Tpun is dependent on WW, so include method.h

- In method.h
WW is not dependent on Tpun, so don't include class.h


Also needless to mention, I hope you are using inclusion guard macros

[tonnot]

Yes ... of course I have guard macros.
I can't put all the code for method.h, but believe me , it needs to knows some structs of class.h.
So, as I have to declare the template functions on my class.h ( The templates implementatin cannot be written at cpp , isn't ) I have two options :
Re-write my template functions to explicit types.
Re-study my classes to write a third ...

Thanks for your time.

[Santosh Reddy]

I would recommend to move all templates to a top level file, (I hope your template implementation does not depend on class.h)

[tonnot]

Thanks again